Funções da GD
PHP Manual

imagecolorset

(PHP 4, PHP 5)

imagecolorsetSet the color for the specified palette index

Descrição

void imagecolorset ( resource $image , int $index , int $red , int $green , int $blue [, int $alpha = 0 ] )

This sets the specified index in the palette to the specified color. This is useful for creating flood-fill-like effects in palleted images without the overhead of performing the actual flood-fill.

Parâmetros

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

index

An index in the palette.

red

Value of red component.

green

Value of green component.

blue

Value of blue component.

alpha

Value of alpha component.

Valor Retornado

Não há valor retornado.

Changelog

Versão Descrição
5.4.0 The alpha parameter was added.

Exemplos

Exemplo #1 imagecolorset() example

<?php
// Create a 300x100 image
$im imagecreate(300100);

// Set the background to be red
imagecolorallocate($im25500);

// Get the color index for the background
$bg imagecolorat($im00);

// Set the backgrund to be blue
imagecolorset($im$bg00255);

// Output the image to the browser
header('Content-Type: image/png');

imagepng($im);
imagedestroy($im);
?>

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Funções da GD
PHP Manual